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An Answer to the Objections Stated by M. De la Lande, in the Memoirs of the French Academy for the Year 1776, against the Solar Spots Being Excavations in the Luminous Matter of the Sun, Together with a Short Examination of the Views Entertained by Him upon That Subject. By Alexander Wilson, M. D. Professor of Practical Astronomy in the University of Glasgow; Communicated by Nevil Maskelyne, D.D. F. R. S. and Astronomer Royal